Weft beating up rotating reed device for circular weaving looms



Dec. 6, 1955 e. CASATI ETAL 2,725,399

WEFT BEATING UP ROTATING REED DEVICE FOR CIRCULAR WEAVING LOOMS 4Sheets-Sheet 1 Filed July 5, 1951 FIG.|

52; \R J r 4' INVENTORS Gvqs-f'a Casa'h' F t f BY arla Cazzqni mama Waqt- Dec. 6, 1955 Filed July 3, 1951 ASATI G. C WEFT BEATING UP ROTATFOR CIRCULAR WEA FIGB ETAL 2,725,899

ING REED DEVICE VING LOOMS 4 Sheets-Sheet 2 IN VEN TORS Gui 5+0 cqs d-By cqrllo 41 140190 Muwm 5. 6mm. qqt.

G. CASATI ET AL TING UP ROTAT Dec. 6, 1955 WEFT BEA ING REED DEVICE FORCIRCULAR WEAVING LOOMS 4 Sheets-Sheet 3 Filed July 5, 1951 FIG.4

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INVENTORS Casa-ri G usfo BY car/0 C4zzani Dec. 6, 1955 INC REED DEVICEFOR CIRCULAR WEAVING LOOMS Filed July 3 1951 4 Sheets-Sheet 4 FIG.9

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nited States Patent '0 WEFT BEATING UP ROTATING REED DEVICE FOR CIRCULARWEAVING LOOMS Giusto Casati, Barzano, and Carlo Cazzaniga, Monticello,Italy Application July 3, 1951, Serial No. 234,994 Claims priority,application Italy December 14, 1950 12 Claims. (Cl. 139-13) The presentinvention relates to a weft beating up rotating reed device and moreparticularly to a weft beating up rotating reed device for circularweaving looms.

One object of the present invention is to form such a reed device inwhich the beating up of the weft thread is performed very gradually.

Another object of the present invention is to construct such a reeddevice from few and sturdy parts which will act trouble-free over a longperiod of time.

A further object of the present invention is to construct such a reeddevice from parts which can be manufactured at a reasonable cost.

With the above objects in view the present invention mainly consists ina weft beating up device for circular weaving looms comprising a shaft,an annular hollow casing having an inner cylindrical side surface andbeing mounted on the shaft adjacent an end portion thereof for freerotation about the axis of the shaft, the end portion of the shaft beinglocated within the casing and the latter having an open end beyond theend portion of the' shaft; a disc fixed to the end portion of the shaftso as to be immovable with respect to the latter, extending transverselyto the shaft axis, and having an annular peripheral portion locatedapart from and facing the inner side surface of the casing to define anannular space with the latter, the peripheral portion of the disc beingformed about its entire periphery with an endless groove facing theinner side surface of the casing, having a first curved part extendingtoward the open end of the casing, a second curvedpart forming anextension of the first curved part of the groove and extending into thecasing away from the open end thereof, and the groove having a thirdpart longer than the first and second parts, communicating with andforming an extension of the latter, and being located more distant fromthe open end of the casing than the first and second parts of thegroove, and a plurality of elongated, identical bar members located nextto each other in the annular space between the disc and casing, each ofthe bar members having a projection located in the groove of the disc,having a substantially pointed free end portion extending from theprojection toward the open end of the casing and being of substantiallythe same length as the distance between the open end of the casing andthe third part of the groove, and the bar members each having a widthapproximately equal to the width of the annular space between the discand casing, whereby rotation of the latter on the shaft causes the barmembers to have their free end portions successively moved beyond theopen end of the casing and back toward the casing by engagement of theprojections of the bars with the first and second parts of the groove ofthe disc.

The novel features which are considered as characteristic for theinvention are set forth in particular in the appended claims. Theinvention itself, however, both as-to its construction and its method ofoperation, together with additional objects and advantages thereof, willbe best understood from the following description of specificembodiments when read in connection with the accompanying drawings, inwhich:

Fig. 1 is a front view of the device according to the present inventionwith a part of the warp threads broken away;

Fig. 2 is a sectional view of the device according to the presentinvention, the section being taken along the line 22 of Fig. 1 in thedirection of the arrows;

Fig. 3 is a fragmentary partially sectional side view showing theover-all structure of the device;

Fig. 4 is a diagrammatic front view similar to Fig. 1;

Fig. 5 is a top view of a disc as seen in the direction of the arrow Aof Fig. 4;

Fig. 6 is a top view of the bar members also viewed in the direction ofthe arrow A of Fig. 4;

Fig. 7 is a bottom view of the member illustrated in Fig. 5 seen in thedirection of the arrow B of Fig. 4;

Fig. 8 is a bottom view similar to Fig. 6 seen in the direction of thearrow B of Fig. 4;

Fig. 9 is a front view similar to Fig. 1 showing the operation of thedevice; and

Fig. 10 is a sectional view also illustrating the operation of thedevice, the section being taken along theline 1010 of Fig. 9 in thedirection of the arrows.

Referring now to the drawings, and more particularly Figs. 1, 2 and 3 ofthe same, the construction of the weft beating up rotating reed deviceis shown in Figs. 1 and 2 whereas Fig. 3 shows the mounting of thedevice on the loom shaft C. As seen in Fig. 2, the reed device comprisesan annnular hollow casing 4 inside ofwhich an annular cylindrical member10 is attached, for instance by means of screws. The inner face of theannular casing 4 and the outer face of the annular cylindrical member 10define between themselves an annular space 5. The casing 4 has an openend and a spherically formed flange portion 4 surrounding the open endof the casing. The spherical radius r of the outer face of the flangeportion 4' has its center in the axis of shaft C and is equal orslightly smaller than the radius R of a circle along which the warpthreads extend in the direction of the axis of shaft C. The members 4and 10 are mounted for free rotation about the shaft 1 by means of theball bearing 2. Fixedly secured to the end of the shaft 1 and alsowithin the hollow casing 4 is a disc 9 having a peripheral portion 7provided with a groove 11 (Figs. 5 and 7). A plurality of elongated andidentical bar members 6 are located next to each other in the annularspace 5 between the annular cylindrical member 10 and the disc member 9on one side, and the annular hollow casing 4 on the other side. Each ofthe bar members 6 has a projection 8 located in the groove 11 of thedisc 6 and a substantially pointed free end portion 6' which extendsfrom the projection 8 toward the open end of the casing 4. The barmembers 6 are located in a vertical plane and fill the groove 5completely. Thus, each bar presses against the neighboring bar as thebars are located in a vertical I groove 5 the pressure of one bar 6 on aneighboring bar 6 has a component for each bar 6 which acts in radial.direction outwardly from the center of shaft 1 toward the inner face ofthe member 4, whereby the bars are frictionally held against the member4 and are moving together with this member when the same is rotated,while being capable of moving axially by cooperation of the barextensions 8 with the groove 11 of the disc 9.

Fixedly connected to the annular casing 4 and the annular cylindricalmember 10 is a bevel gear 3,1ater on also called first gear. This gear 3meshes with a second gear D (Fig. 3) which latter gear is fixedlyattached tosupport arm 12 which extends in a direction normal to theaxis of the main shaft C of the loom from a hollow member M surroundingthe loom shaft. The position of the shaft 1 in the hollow arm 12 isfixed and the shaft prevented from rotation in the hollow arm 12 by apair of set screws, as shown in Fig. 3. The member M is mounted forrotation in the direction of the arrow b on a ball bearing fixed toshaft C and is driven by a pinion 13 mounted in the hollow shaft C andengaging with gear teeth formed on the inside of the member M. Thepinion 13 is driven by a shaft 14 located inside the hollow shaft C.

Thus, when the shaft C and the member M are rotated the casing 4 willrotate about the shaft 1 in the direction of the arrow :1 and the reeddevice will at the same time rotate about the axis of the loorn shaft Cin the direction of the arrow b. It should be noted that the shaft 1 andthe disc 9 fixedly attached thereto will thereby rotate only about theaxis of the loom shaft C but notabout its own axis as the shaft 1 isheld stationary in the hollow support arm 12.

The endless groove 11 formed in the disc 9 is best shown in Figs. 5 and7. The groove 11 comprises a first curved part 15 extending toward theopen end of the casing 4 when the disc 9 is mounted in the casing 4 asshown in Fig. 2, a second curved part 16 forming an extension of thefirst part 15 and extending into the casing 4 away from the open end ofthe same, and a third part 17. This third part 17 is longer than thefirst part 15 and the second part 16, communicates with and forms anextension of the second part and is located more distant from the openend of casing 4 than the first and second parts of the groove 11. Asindicated in Fig. 4, the first and the second part of the groove extendseach through an angle of about 20, and the third part 17 of the grooveextends approximately through an angle of 320. Fig. 7 also shows clearlythat the second part 16 of the the groove has an end portion 16' whichcurves away from the open end of the casing 4 by an angle sharper thanthat with which the first part 15 of the groove approaches the open endof the casing 4.

The operation of the device can be best seen from the Figs. 9 and 10when taken in conjunction with the Fig. 3 which shows the overallconstruction of the device and its mounting on the loom.

As mentioned before, the reed device will rotate, when the main shaft Cof the loom is rotated, about the axis of the shaft C in the directionof the arrow b. At the same time the casing 4 and the cylindrical memberattached thereto will be driven by the gears G and 3 and rotatetherefore about the axis of the first shaft 1 on which the casing 4 andthe cylindrical member 9 are mounted for free rotation.

The weft thread Ft is fed into the warp shed by the weft thread carrierin a plane slightly higher than the plane indicatedby the lines TT' inFig. 9. This plane indicates the top of the already finished fabric andis (as is clearly shown in Fig. 9) tangential to the circle formed bythe outer faces of the bar members 6. The pointed ends 6' of the barmembers 6 are flush with the end face of the hollow casing 4 when theprojections 8 of the bar members 6 are engaged in the third part 17 ofthe disc groove 11 and as this face of the spherically formed flangeportion 4 is formed along a radius r equal or slightly smaller than theradius R of the circle along which the warp threads extend about theaxis of the loom shaft, the pointed end 6' will just about touch thewarp threads. When during the rotation of the reed device about the axisof the first shaft 1 the projections 8 of the bar members 6 are locatedin the first part 15 of the disc groove, the pointed ends 6' of thesebar members, which are spaced from each other a distance approximatelyequal to the spacing of the warp threads, will be pushed outwardlybeyond the spherical face of the casing 4 and enter thereby between thewarp threads fo. In this position, the

pointed ends 6 of the bar members come in contact with the weft threadPt and push the weft thread Ft, during the rotation of the device, fromthe position in which the weft thread is fed between the warp threads tothe finished position indicated by line T-T'. The beating up of the weftthreads occurs as the bar members 6 rotate through the angles d and eindicated in Fig. 4 whereby the members 6 are advanced during therotation through the angle [1 and retracted during rotation through theangle e. It should be noted that the retraction of the members 6 occursmuch faster than the advance of the same, as the rise of the first part15 of the groove is much more gradual than the drop of the end portion16 of the second part 16 of the groove.

It should be noted further that during the rotation the pointed ends 6of the bar members projecting between the warp threads cooperate withthe warp threads in a manner similar as a pinion meshing with a rack andthis cooperation between the pointed ends of the bar members 6 with thewarp threads f0 prevents also an angular displacement of the bars 6 withrespect to the casing 4.

By the insertion of the pointed ends 6' between the warp threads fo thespacing between the warp thread is also adjusted so that the device actsas a reed.

It will be understood that each of the elements described above, or twoor more together, may also find a useful application in other types of aweft beating up rotating reed device for circular weaving loomsdiffering from the types described above.

While the invention has been illustrated and described as embodied in aweft beating up rotating reed device, it is not intended to be limitedto the details shown, since various modifications and structural changesmay be made without departing in any way from the spirit of the presentinvention.

Without further analysis, the foregoing will so fully reveal the gist ofthe present invention that others can by applying current knowledgereadily adapt it for various applications without omitting featuresthat, from the standpoint of prior art, fairly constitute essentialcharacteristics of the generic or specific aspects of this inventionand, therefore, such adaptations should and are intended to becomprehended within the meaning and range of equivalence of thefollowing claims.

What is claimed as new and desired to be secured by Letters Patent is:

l. A weft beating up device for circular weaving looms, comprising, incombination, a shaft; an annular hollow casing having an innercylindrical side surface and being mounted on said shaft adjacent an endportion thereof for free rotation about the axis of said shaft, said endportion of said shaft being located within said casing and the latterhaving an open end beyond said end portion of said shaft; a disc fixedto said end portion of said shaft so as to be immovable with respect tothe latter, extending transversely to said shaft axis, and having anannular peripheral portion located apart from and facing said inner sidesurface of said casing to define an annular space with the latter, saidperipheral portion of said disc being formed about its entire peripherywith an endless groove facing said inner side surface of said casing,having a first curved part extending toward said open end of saidcasing, a second curved part forming an extension of said first curvedpart of said groove and extending into said casing away from said openend thereof, and said groove having a third part longer than said firstand second parts, communicating with and forming an extension of thelatter, and being located more distant from said open end of said casingthan said first and second parts of said groove; and a plurality ofelongated, identical bar members located next to each other in saidannular space between said disc and casing, each of said bar membershaving a projection located in said groove of said disc, having asubstantially pointed free end portion extending from said projectiontoward said open end of said casing and being of substantially the samelength as the distance between said open end of said casing and saidthird part of said groove, and said bar members each having a widthapproximately equal to the width of said annular space between said discand casing, whereby rotation of the latter on said shaft causes said barmembers to have their free end portions successively moved beyond saidopen end of said casing and back toward said casing by engagement ofsaid projections of said bars with said first and second parts of saidgroove of said disc.

2. A weft beating up device as defined in claim 1 and wherein said openend of said casing has a curved end face formed along an arc whosecenter is located in the axis of said shaft and at a substantialdistance from said end portion of said shaft.

3. A weft beating up device as defined in claim 1 and wherein a gear islocated about said shaft and fixed to said casing to transmit rotationto the latter.

4. A weft beating up device as defined in claim 1, an annular,cylindrical member of the same diameter as said disc being located insaid casing on the opposite side of said disc from said open end of saidcasing and being fixed to the latter for rotation therewith, each ofsaid bar members having end portions opposite to said pointed free endportions thereof and extending into the space between said annularcylindrical member and said inner side surface of said casing so as tobe guided for movement toward and away from the area beyond said openend of said casing.

5. A weft beating up device as defined in claim 1, a vertical loomshaft; support means carrying said firstmentioned shaft in a positionwhere it extends perpendicularly from the axis of said loom shaft andmounting said first-mentioned shaft for rotation in a horizontal planeabout said loom shaft while extending perpendicularly therefrom; a firstgear fixed to said casing to transmit rotation to the latter; and asecond gear mounted on the loom about said loom shaft and engaging saidfirst gear to impart rotation to the latter and said casing therewithupon movement of said first-mentioned shaft about said loom shaft.

6. A weft beating up device as defined in claim 5 and wherein said firstand second parts of said groove of said disc are located at the bottomof the latter.

7. A weft beating up device as defined in claim 6 and wherein said firstand second parts of said groove of said disc extend throughapproximately 40 while said third part of said groove extends throughapproximately 320.

8. A weft beating up device as defined in claim 7 and wherein said firstand second parts of said groove each extend through approximately 20.

9. A weft beating up device as defined in claim 5, and wherein said openend of said casing has a curved end face formed along an arc whosecenter is in the axis of said loom shaft and in the axis of saidfirst-mentioned shaft.

10. A weft beating up device as defined in claim 1 and wherein saidfirst and second parts of said groove of said disc extend throughapproximately 40 while said third part of said groove extends throughapproximately 320.

11. A weft beating up device as defined in claim 10 and wherein saidfirst and second parts of said groove each extend through approximately20.

12. A weft beating up device as defined in claim 1 and wherein saidsecond part of said groove of said disc has an end portion distant fromsaid first part of said groove and curving away from said open end ofsaid casing by an angle sharper than that with which said first part ofsaid groove approaches said open end of said casing so that said barmembers are moved into said casing at a faster rate than they are movedout of said casing.

References Cited in the file of this patent UNITED STATES PATENTS

